Saw-tooth



(No Model.)

R. W.- PROSSER.

, sW TOOTH,- No. 272,319.y l y Patented Feb. 13 1883.

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UNITED STATES PATENT OFFICE.

'ROBERT w. PRossEE, 0E TRENTON, NEW JERSEY.

SAW-TOOTH@ SPEIFICATION forming part of Letters Patent No. 272,319, dated February 13, 1883.1

Application tiled September 19, 1882. (No model.) v

To all whom it may concern:

Be it known that IRoBERT W. PROSSER, ofthe city ot Trenton, in the county of Mercer and State of New Jersey, have'invented a new and usei'ul Itnprovement in Insertible-Tooth Saws; and I do hereby declare that the following is a t'ull and exact description ofthe construction and operation ofthe same, reference beinghadtotheaccompanyingdrawings,which form a part ot' this speciiication.

My invention relates particularly to those insertible teeth for saws whichare tted with a groove into arecess or bearing in the sawplate, having a circular curvature, and secured by a rivet inserted partly in4 the tooth and partly in the plate.

The invention consists in the combination, in an insertible-tooth saw, ofaplate having a recess or bearing of circular curvature, with an abutment at its inner end, a tooth having a back ot' corresponding curvature and made to tit said abutment, the said plate and too:h being fitted together with a groove, and a rivet inserted in said tooth and plate in a position between the said abutment and the prolongation of a diametral line drawn from the outer termination of said recess or bearing.

In the accompanying drawings, Figure l 1s a side view of a portion of a saw-plate prepared for the reception ot' a tooth. Fig. 2 is a side view of a similar portion ofthe saw-plate with the tooth inserted and secured by the rivet. Fig. 3 is au edge view corresponding with Fig. 2.

A is the sawplate. B is the tooth, and C the rivet. The recess or bearing a in the plate is milled out in the usual way, to iit the back of the tooth, for a distance from its outer extremity, b, equal to or greater than halt the circumference of a circle, and thence is prolonged some distance to provide for the insertion otl the rivet C, and it is represented as 4terminating in a shoulder or abutment, c, against which the heel d of the tooth ahuts, and by which any tendency ofthe tooth to turn in its recess or bearing while at work is rewhich abuts against the abut ment c.

sisted. The back of the tooth conforms to the circular curvature of the recessa,and the tooth is similarly prolonged beyond a semicircle to receive the rivet U and forni the heel 1 and 2 ot the drawings. -The object of plac-y ing the rivet in this position is to hold the tooth in position by forcing the back ot' the tooth into its groove near the extremity b ofl 4the recess in the plate, and it also performs the function of preventing the tooth turning round in the groove.

' This tooth is applicable to either circular or other saws.

In milling the teeth the diameter may be either ot' the exact size of the recess in the saw-plate or sligh tly larger, so as to give them some spring when inserted in plate. The tendency of the end D ot' the tooth to twist out ot' the plate is resisted by the countersink of the rivet.

-What Iclaiin as my invention, and desire to secure by Letters Patent, is-

The combination, in an insertibe-tooth saw, ot' a plate having a recess or bearing of circular curvature, with an abutment at its inner end, a tooth having a back of corresponding curvature and made to iit the said abutment, the said plate and tooth being fitted together with' a groove, and a rivetl inserted in said tooth and plate in aposition between the said abutment and a prolongation of a dialnet-ral line drawn 'from the outer termination ot' said recess or bearing, substantially as and for the purpose herein described. y

ROBERT W. PROSSER.

Witnesses:

FREDK. HAYNES, En. L. MoAN.l

The rivet 

